#include <myheader_c_plus.h>
using namespace std;
void test2(){
    
    string s = "123 dadfa adfa";
    int num;
    string s1;
    string s2;
    istringstream ss(s);
    ss >> num >> s1 >> s2;
    cout << num + 1 << ":" << s1 << ":" << s2 << endl;

}

void test(){
    int num = 100;
    string s1("hello");
    string s2("world");
    ostringstream ss;
    ss << num << s1 << " " << s2 << endl;
    cout << ss.str() << endl;
}
int main(int argc, char *argv[])
{
    
    test();
    return 0;
}

